error while evaluating benefits for employee

Summary:

Hello,

Created plan and program with each of the life events having coverage start date and end date as 'as of event' and '1 day before event'

Still i get the below error when trying to evaluate life event.

Content (please ensure you mask any confidential information):

The coverage start date can't be determined. Review the plan design configuration to ensure the coverage start date is specified. (BEN-990168)
If the coverage start date is configured as enterable, ensure that the coverage is entered. If the plan design allows for a coverage start date formula, try revising the formula. Context at the time of error: Person Abhishek Murlidhar Choudhari, Program New Hire test program, Plan New hire test plan, Option New hire + family test.